383 Cam Question

I am building a 383 Stroker with fully ported CNC heads, Oliver rods with Wiseco pistons, Slp Headers and i need some info about this cam. I am running a 6lb Powerdyne on this setup but i would like to go with a 110 lsa cam with 525/540 lift cam with 242/252 duration and i would like to know if this cam would kill me, if so how much? Thanks for the info.

- Brandon

Originally posted by Teal95TA
I am building a 383 Stroker with fully ported CNC heads, Oliver rods with Wiseco pistons, Slp Headers and i need some info about this cam. I am running a 6lb Powerdyne on this setup but i would like to go with a 110 lsa cam with 525/540 lift cam with 242/252 duration and i would like to know if this cam would kill me, if so how much? Thanks for the info.

- Brandon

I think this cam may have too much over lap and way too much duration imho. Usuaully force inducted cam have a lsa of 114 or higher. You wouldnt want blow all of your expensive boost out of the exaust. I would highly recomend a xe-224-236 cam on a 114lsa. Im sure your going to get more opinons on this but this is jus mine.:)

I dont know how well it would work, but at the rpm range that cam would need to run, overlap would not be as big a factor as if it where a cam designed to run to say 5,500 rpm. Thats not to say it would be an ideal cam, I am just saying I have seen some blower and turbo cams for higher rpm applications with 110 & 112 lsa... That seems to be low lift for that duration, and to rev your motor as high as that cam would want to rev in a blower application you will want to be careful no to overspin the powerdyne! Also to go over 7,000 I think you will be needing an aftermarket engine management setup.

Personally, I like RPM. It kills parts, but you have fun doing it! From what I've seen, that may be a bit too much cam...but then it depends on the application. I'm assuming your going for a street bruiser because of the parts you listed and by only running 6psi. I'm sure you know this, but there's a lot of factors that affect camshaft selection and it would be helpful to include some of this information. What pistons and what CR are you running? Which head castings? Hydraulic roller or other? What gears, tires, etc? Most importantly, what do you intend to do with the motor? There are definitely some guys on this board that can steer you in the right direction.

That cam will really cause the Powerdyne to fall on it's face. If you're gonig to run a small blower on a 383, you have to use a cam with minimal overlap, otherwise you'll be blowing the boost right out the exhaust, and a blower like a Powerdyne will most certainly become quite a restriction. We had a customer a while back with a 396 built for N/A operation, which had a cam similar to yours. His was 11:1 compression, and he had a Powerdune sitting around from his old engine, so he decided to throw it on and see what happened. The car was SLOWER with the blower on it. It only saw 3psi at 6700, and no boost uder 5000rpm. The blower just could not keep up. Needless to say, the blower came right back off. The only way to run a small blower on a larger displacement engine is to keep overlap to a minimum. I hope this helps.

Seth

Originally posted by cmotorsports.com
That cam will really cause the Powerdyne to fall on it's face. If you're gonig to run a small blower on a 383, you have to use a cam with minimal overlap, otherwise you'll be blowing the boost right out the exhaust, and a blower like a Powerdyne will most certainly become quite a restriction. We had a customer a while back with a 396 built for N/A operation, which had a cam similar to yours. His was 11:1 compression, and he had a Powerdune sitting around from his old engine, so he decided to throw it on and see what happened. The car was SLOWER with the blower on it. It only saw 3psi at 6700, and no boost uder 5000rpm. The blower just could not keep up. Needless to say, the blower came right back off. The only way to run a small blower on a larger displacement engine is to keep overlap to a minimum. I hope this helps.

Seth

Thanks for this real world proof of what I have been trying to tell people for a long time. The small blower couldn't flow enough air to keep up with the motor.

Rich Krause